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Home >> Chevrolet >> 2019 >> Bolt EV Premier >> Repair and Diagnosis >> External Pages >> Different car >> Section 1 (Cellular System, Entertainment System, And Navigation System) >> Diagnostic Information and Procedures >> DTC B125A >> Circuit/System Testing

Circuit/System Testing

WARNING: This page is about a different car, the 2018 Chevrolet Bolt EV. However, it is still accessible from the selected car via links, so may be relevant.
  1. Ignition/Vehicle & All vehicle systems - Off
  2. Disconnect the electrical connector: Coax Cable @ A11 Radio & T23 Radio Antenna Amplifier
  3. Perform the following procedure/test: Coax Cable - Component Testing

    Verify the procedure/test passes.

    • If the component does not work as specified 

      Replace the component: Coax Cable

    • Go to next step: If the components test normal 
  4. Connect the component: Coax Cable @ A11 Radio
  5. Ignition - On/Vehicle - In Service Mode - A11 Radio - ON
  6. Verify a test lamp turns On between the test points: Coax Cable Center @ T23 Radio Antenna Amplifier & Ground
    • If the test lamp does not turn On 
  7. Replace the component: A11 Radio
    • Go to next step: If the test lamp turns On 
  8. Test or replace the component: T23 Radio Antenna Amplifier